Cheapest way to change ratios on an 8-3/4, and what ratio to choose?

"292" could mean anything from 230 @ .050 to 250 @ .050. That's the bad part. How radical an idle does it have? I think rumblefish meant purple cam. If you have the 292 purple cam, he's right. No amount of gear change is gonna help a lot. If you can give us maybe duration @ .050 numbers........

The bad thing is if the cam is stout @ .050, regearing to even say a 3.55 might make it a slug on the bottom end. It all depends.